WASHINGTON - Sulaiman Abu Ghaith, the charismatic al-Qaida spokesman, fundraiser and son-in-law to Osama bin Laden, is likely to have a vast trove of knowledge about the terror network's central command but not much useful information about current threats or plots, intelligence officials and other experts say.

Abu Ghaith pleaded not guilty Friday to conspiring to kill Americans in propaganda videos that warned of further assaults against the United States as devastating as the Sept. 11, 2001, attacks on the World Trade Center and the Pentagon that killed nearly 3,000 people.

Believed to be more of a strategic player in bin Laden's inner circle than an operational plotter, Abu Ghaith would be the highest-ranking al-Qaida figure to stand trial on U.S. soil since 9/11. Intelligence officials say he may be able to shed new light on al-Qaida's inner workings - concerning al-Qaida's murky dealings in Iran over the past decade, for example - but probably will have few details about specific or imminent ongoing threats.

He gave U.S. officials a 22-page statement after his Feb. 28 arrest in Jordan, according to prosecutors. They would not describe the statement.

Abu Ghaith said little during the 15-minute hearing in U.S. District Court in New York and displayed none of the finger-wagging or strident orations that marked his propaganda after 9/11.

Through an interpreter, Judge Lewis A. Kaplan asked whether he understood his rights. Abu Ghaith nodded and said, "Yes." Asked whether he had money to hire an attorney, he shook his head and said no. He nodded and said yes when asked whether he had signed an affidavit describing his financial situation.

Kaplan promised to set a trial date when the case returns to court on April 8. Bail was not requested, and none was set.